Fig. 2 in The problematic early Cambrian fossil Tumulduria incomperta represents the detached ventral interarea of a paterinid brachiopod

Fig. 2. Paterinid brachiopod Tumulduria incomperta Missarzhevsky in Rozanov et al, 1969. Fragmentary valves. Aldan and Uchur River area, Nochoroicyathus sunnaginicus Zone, Siberia. A. NRM Br141136, sample 449, left lateral half of ventral interarea; A1, view from above; A2, oblique posterior view; A3, detail of pseudodeltidium in oblique view. B. NRM Br141137, sample 1832, fragment preserving junction of ventral interarea and ventral shell surface; B1, view from posterior; B2, oblique posterolateral view. C. NRM Br141138, sample 525, fragment of shell surface with fila and nick points.